All names: Gaia DR2 1741911299283825408, TIC 291980636, Gaia EDR3 1741911299283825408, PG 2128+089, UCAC4 496-141973, SDSS J213105.17+090753.2, PG2128+089, GALEX J213105.0+090753, 2MASS J21310516+0907532, UCAC2 35124909, Gaia DR3 1741911299283825408
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 31 05.17 (0.04) | 21 31 05.20 | 21 31 05.18 (0.04) | ||
| Declination | 09 07 53.16 (0.04) | 09 07 54.15 | 09 07 53.34 (0.04) | ||
| Spectral type | sdO | sdOA | |||
| Effective temperature | [K] | ||||
| log(g) | [cgs] | ||||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.80 (0.05) | 1.00 (0.06) | 0.80 (0.05) | |
| Distance | [pc] | 1252.66 (77) | 1000.50 (63) | 1252.66 (77) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -7.595 (0.05) | -7.781 (0.1) | -7.595 (0.05) | |
| Proper motion (declination) | [mas/yr] | -11.677 (0.04) | -11.801 (0.1) | -11.677 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.26 (0.04) | ||||
| V magnitude | 15.53 (0.04) | ||||
| R magnitude | 15.66 (0.2) | ||||
| I magnitude | |||||
| J magnitude | 16.02 (0.1) | 16.02 (0.1) | |||
| H magnitude | 16.13 (0.2) | 16.13 (0.2) | |||
| K magnitude | 16.99 | ||||
| u magnitude | 14.87 (0.004) | ||||
| g magnitude | 15.20 (0.003) | 15.24 (0.04) | |||
| r magnitude | 15.65 (0.005) | 15.77 (0.1) | |||
| i magnitude | 16.01 (0.005) | ||||
| z magnitude | 16.33 (0.009) | ||||
| G magnitude | 15.43 (0.003) | 15.45 (0.001) | 15.43 (0.003) | ||
| BP magnitude | 15.28 (0.004) | 15.24 (0.01) | |||
| RP magnitude | 15.71 (0.005) | 15.70 (0.005) | |||
| Pan g magnitude | 15.27 (0.005) | ||||
| Pan r magnitude | 15.69 (0.002) | ||||
| Pan i magnitude | 16.04 (0.002) | ||||
| Pan z magnitude | 16.32 (0.002) | ||||
| Pan y magnitude | 16.50 (0.006) | ||||
| E(B-V) | 0.041 | ||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.